Respuesta :

altavistard
4n3 2m 6m 5n 2n  should be written as  {4n^3, 2m, 6m, 5n, 2n}

4n^3 stands alone.  No other term has this format.
2m and 6m are like terms and can be combined into 8m.
5n and 2n are like terms and can be combined into 7n.